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A blue dwarf star with an unusual spectrum, Achernar has a magnitude of +0.5, making
it the brightest of the stars of Eridanus, and the ninth brightest in the entire sky.
Bright Achernar lies at the extreme southern tip of the star-river Eridanus, less than a degree from its southernmost border with neighbouring Hydrus.
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x Carinae w Carinae Polis YZ Ceti V2306 Ophiuchi La Superba Struve 2398 A DO Cephei Kruger 60 A Koit Koeia s Velorum A ο1 Cygni Struve 2398 B Nashira θ Hydrae Sharjah Pincoya Poerava Mekbuda π Cephei Miram Alkaphrah β Reticuli Cerberus b Velorum AX Microscopii 41 Draconis Adhafera a Velorum Acubens Guniibuu GX Andromedae HD 37131 Nosaxa Felixvarela FL Virginis Gakyid ι1 Scorpii Kapteyn's Star HR 5546 ε Indi Dombay e Aquilae Ebla Erakis Copernicus Wolf 359 δ Pavonis Wezen W Virginis ρ Cygni Wolf 498 Zaniah HR 7687 14 Persei Polaris π5 Orionis Castor B Capella Lalande 18115 Proxima Centauri Canopus BZ Crucis 15 Orionis Rastaban 19 Cygni BF Orionis Betelgeuse δ Andromedae δ Caeli Ran β Pictoris δ Circini β Doradus Azmidi Deneb η Carinae Enif Antares Sham γ Pavonis Alchiba θ Circini ε Reticuli Alfirk Teegarden's Star σ Orionis Naos Arneb Sirius Sirius B χ Cygni α Telescopii τ Ceti Almaaz Tarazed Alnilam Alnitak ν2 Canis Majoris Suhail Schedar WX Ursae Majoris van Maanen's Star Atria Rigel α Centauri A Mebsuta 61 Cygni A 61 Cygni B Ross 154 HO Librae UV Ceti Menkar Avior Unurgunite Hatysa Achird U Sagittarii ο Capricorni B Sadr Aspidiske Tureis Mira Saiph Mirfak EE Leonis Sargas Gliese 536
Achernar
Hertzprung-Russell diagram plotting the temperature and luminosity of Achernar (marked by the red circle) relative to other stars.
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